Russell Sage (August 4, 1816 – July 22, 1906) was a financier, railroad executive and Whigpolitician from New York, United States. As a frequent partner of Jay Gould in various transactions, he amassed a fortune. Olivia Slocum Sage, his second wife, inherited his fortune, which was unrestricted for her use. In his name she used the money for philanthropic purposes, endowing a number of buildings and institutions to benefit women's education: she established the Russell Sage Foundation in 1907 and founded the Russell Sage College for women in 1916.